/*
 * Copyright (C) 2013 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.example.android.common.logger;

/**
 * Simple {@link LogNode} filter, removes everything except the message. Useful
 * for situations like on-screen log output where you don't want a lot of
 * metadata displayed, just easy-to-read message updates as they're happening.
 */
public class MessageOnlyLogFilter implements LogNode {

	LogNode mNext;

	/**
	 * Takes the "next" LogNode as a parameter, to simplify chaining.
	 *
	 * @param next
	 *            The next LogNode in the pipeline.
	 */
	public MessageOnlyLogFilter(LogNode next) {
		mNext = next;
	}

	public MessageOnlyLogFilter() {
	}

	@Override
	public void println(int priority, String tag, String msg, Throwable tr) {
		if (mNext != null) {
			getNext().println(Log.NONE, null, msg, null);
		}
	}

	/**
	 * Returns the next LogNode in the chain.
	 */
	public LogNode getNext() {
		return mNext;
	}

	/**
	 * Sets the LogNode data will be sent to..
	 */
	public void setNext(LogNode node) {
		mNext = node;
	}

}
